ftp.ntua.gr:/debian/dists/sid/main/installer-arm64/20210415/images/u-boot/?C=S&O=D 
Icon  Name                                                    Last modified      Size  
[DIR] Parent Directory                                                             -   
[   ] rock-pi-4-rk3399.img.gz                                 15-Apr-2021 01:06  496K  
[   ] pinebook-pro-rk3399.img.gz                              15-Apr-2021 01:06  492K  
[   ] rockpro64-rk3399.img.gz                                 15-Apr-2021 01:06  489K  
[   ] puma-rk3399.img.gz                                      15-Apr-2021 01:06  474K  
[   ] firefly-rk3399.img.gz                                   15-Apr-2021 01:06  459K  
[   ] rock64-rk3328.img.gz                                    15-Apr-2021 01:06  403K  
[   ] pine64_plus.img.gz                                      15-Apr-2021 01:06  346K  
[   ] pinebook.img.gz                                         15-Apr-2021 01:06  342K  
[   ] a64-olinuxino.img.gz                                    15-Apr-2021 01:06  337K  
[   ] teres_i.img.gz                                          15-Apr-2021 01:06  336K  
[   ] orangepi_zero_plus2.img.gz                              15-Apr-2021 01:06  327K  
[   ] nanopi_neo2.img.gz                                      15-Apr-2021 01:06  327K
Apache/2.2 Server at debian.noc.ntua.gr Port 80